Fluid brake



@et 23, w23. hmmm L. J. ROOT FLUID BRAKE Filed Dec. l1. 1919 ipelented @cto 23 v ,mitre t i l FLUKE@ oper-nenes one necemeee il, loro. sensi ne.

To @ZZ 'whom it may concern.'

Be it lrnovvn thetl, ELEMMA il'. lloor, e citizen-olE the United States, residing et Seattle, in the county ci King end State of "Washin, ton, have invented certe-in new end oseful Improvements in e Fluid Broke, of which the vfollowing is e specification.

'llhis inventionreletes gene-inlly to fluid clutches end more particularly to that type of clutches designed to reterd or check the rotary movement of e, shaft, lor .other rototing element, or to electtrensrnission oi power `from e drive element 'to e driven element.

The principe] objects of the invention one: lirst, to devise e clutch of the type indicated wherein the clutching ection may be increased .or decreased to retard or eccelerete the rotation of e shaft or other rototing element between Ithe meninaumf-full speed, or the minimum-e complete stop; second, to effec-t transmission of power from e drive she'lt to e driven shalt; third, to eflect e clutching action Without coincident shocks es in devices et present nsefl for e like purpose; end' fourth, to decreese frictionel weer on the clutch element.

With these end other objects in view as will appear in the following description teken in connection with the accompanying l drawings the invention comprises the verions novel ieetures ci construction end errengernent of parte, which will he more fully described hereinefter end set forth with particular-ity in the cleirns eppended hereto.

ln the drnvvings- Figure i is e transverse section or' the invention, end

Figure 2 is e slight modicetion of the piston' `end velveconstrnction.

Figure 3 is e detnil of the eccentric connections, shown in l.

Corresponding ports in the severel ligeros ere indient@ by similer cherecters of reierence.

Referring particularly to Fig. l of the draining? wherein is illustrated the device es edepteol to retercl or stop the rotetion of o sheft, shown et lo, e centrally disposed cese or eccentric housing A, having .en opper convex well l end e.v lovvenconceve well 2, terminates in opposed `cylinders provided in the n per end lower portions crimen outer en s with outlet end inlet neme end o respectively end within which ere outlet valves o end inlet velves 7. The cylinders ere lconnected intermediate their extremities with e cesing 8 having :i centrally convex top 9 end provided With n centrally conve-ir partition l0 dividing the interior thereof into what shell term o circnletion cheniloer E end e compression clinrnloer C communicating" through the inlet end ont-let ports 5 and in e manner which will he hereinafter described. A hollow sleeve or cylinder ll the top portion of which is provided with e opening il", is mounted on the partition l0 md communicates with the compression cheinher C through en opening l2 formed therein. ill`he sleeve ll extends univer-"illy through the top 9 of the cesing 8 end is provided with en opening l ceinnieniceting` with the chemher A trnnlr volvo le connected hy e rod l5, extending through she opening ll", end secured to e siiitehle opereting lever (not shovvnl is slidnhly mounted in the sleeve 1l for controlling communication between the chambers C end B lor e purpose which will hereinafter eppeer.

The sheiit 16 the rotation ol which is to he controlled hy the cliitch constituting this invention to loe of any conventional type end extends through the honsiinraga fl-.end has nxedly mounted thereon en eccentric 17 ehont which ere mounted straps 18 rigidly connected es et i9 to piston rods 20 which pivotelly engage es cl2()7 piston hends 21 opereting in the c lieder-s 3.

The operetion oi this forni of the invention is es 'follows Normelly the volvo Ll is disposed in en open position, es shown in; Figure l, end noon rotation of the shell; lo the pistons 21 will he reciprocnted in the cylinders 3 dreiving in ilnicl which moy he e snitehle tluid lroin the circule-ting chamber B through inlet velves li end expelling it into the coinpression chernber C through outlet valves e, ond es cornrnunicetion is established between the chambers C end B through openings l2 end i3 (the velve il being open) e circuletion vvill be ellccted liet-Ween the tvvo chem# here which *will not hinder or reierd the oneretion of the pistons (the size of the chemhers end volves heine; snhiciently lerge to lgnerrnit of free circnlntion) However, 'when the volvo ll is moved dovvnvverdly in the sleeve ll the opening i3 will loe constricted end circuletion will he retarded consequently reterding the notion ori the pislill@ wei tons through duid resistance due to increase of compression in thechamber C, and vwhen the valve 14 completely closes the opening 13 the compression in the--chamber C will increase until the pistonscan `no longer reciprocate and rotation of the shaft 16 will be stopped. lit will be seen that as the valve 14 is moved downwardly the rotation of shaft 16 is g dually retarded until a complete stop is edected.

ln the mmication illustrated in Figure 2 the piston '21 is reciprocated in a cylinder 3 having double heads 22 forming compartments X and Y, provided with intake valves 5' and exhaust valves 6', so that upon movement of the compression stroke of the piston in compartment Yl suction will be caused in the compartment X and vice versay thus utilizing Jior the pumping action only one piston and cylinder as compared with two in the preferred form illustrated 1n Figure l.

From the foregoing description taken in4 connection with the accompanying drawings, it is thought that a clear and comprehensive understanding of the construction, operation, and advantages of the invention may be had,.but While l have shown and described the device as embodying a s cific structure, li desire it to be understo' that changes ma be made in said structure as do not depart rom the spirit and scope of the invention as claimed,

What il claim is:

1. ln combination with a rotatable sha-tt, means of the type ldescribed including pistons eccentrically connected with the shaft, a plurality of communicating chambers ar- :o er within each other, one of said chambe receiving the pistons, valves for con-v trolling circulation oi fluid through said chambers upon reciprocation of the pistons, and a valve for closing communicatlon between said chambers to induce compression to retard reciprocation of said pistonsv to regulate the rotation of the shaft.

2. The combination with a drive element and a driven element, of a casing, partitions in the casin dividing the same into a circulating cham r and a compression chamber, valves for eecting communication between the compion chamber and circulating chamber, cylinders, pistons in -said cylinders, eccentrically mounted on the other element, straps on the eccentrios connected with the pistons for reciproing the inf/naar pistonsupon rotation of the element on' which they are mounted, to e'ect circulation of iuid from the circulation chamber to the compression chamber, a valve for opening and closing communication between the compression chamber and circulation chamber whereby. to increase or decrease compression inthe compression chamber for retarding or stopping the reci rocation of the pistons to e'ect rotationv o the casing with the element piston carried element, and the casing connected vwith the driven lelement for eiiecting more or le complete transmission of power from the drive to the drivenv element.

3. The combination with a drive element and a driven element, of a casing, partitions in the casing dividin the same into a circulating chamber an a compression chamber, valves tor e'ecting communication between the compression and circulating chambers, cylinders, pistons in said cylinders, eccentrically mounted on the drive element, straps on the eccentric connected with the pistons for reciprocating the pistons upon rotation oi? the drive element, to effect circulation of fluid from the circulation chamber to the compression chamber, a valve for opening and closing communication between the compression and circulation chambers whereb to increase or des` crease compression in t e compression chamber for retarding or stopping the reciprocahaving alined chambers, mean-s for edectingcirculation of iluid through said chambers, check valves for controlling the circulation of the fluid through the chambers, and means connected with the drive element for compressing the fluid upon the shutting .off of circulation, to e'ect a more or less complete transmission of power from the drive to thedriven element.

In testimony whereof l, atlx my si hereto.

nanna a aoor.' 

